Draw-bar-yoke key.



C. A. CARSCADIN.

DRAW BAR YOKE KEY.

APPLICATION mm mu. m. 1911.

Patented June 18, 1918.

STATES PATENT OFFICE.

CHARLES L GARSCADIN, or cnIcA oo, ILLINOIS, ASSIGNOR TO NATIONAL can nonre- MENT COMPANY, or CHICAGO, ILLINoIs, A CORPORATION or ILLINOIS.

DRAW-BAR-YOKE KEY.

Specification of Letters Patent.

Application filed January 18, 1917. Serial No. 143,001.

To all whom it may concern:

Be it known that I, Om n ns' A. CARSCA- DIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Draw-Bar-Yoke Keys,- of which the following is a specification.

I The drawbar and yoke of railway draft rigging is generally connected by a key which is loosely mounted in suitable openings or slots therein and sometimes in the draft arms or sills. One end of the key is usually offset and a collar and cotter, or similar pin, are provided to prevent dislodgment of the key which, however, is free tov move in the slots. The movement of the key i sufficient to cause the collar to engage the adjacent draft arm or the side of the yokeand thus shear the cotter pin. The key is then free to drift out ofthe slots and unexpectedly disconnect the yoke and drawbar, frequently with serious damage.

It is the primary object of my invention to provide a key for",connecting a drawbar and yoke constructed'to insure, against accidental displacement and consequent separation of the drawbar and yoke.

A further object of my invention is the provision of a key for connecting a drawbar and yoke which is constrained to move with the drawbar so that its movement relatively to the yoke is limited.

Further objects and advantages of my invention will be apparent as it is better understood by reference to the followin specification when read in connection with the accompanying drawing, illustrating the preferred embodiments thereof, in which- Figure 1 is a side elevation of my invention in use;

Fig. 2 is a section on the line 22 of Fi 1- Fig. 3 is a vertical section illustrating a slightly different form of key, and

Fig. 4 is a perspective view of the key illustrated in Fig. 3.

Referring ing, 5 indicates a drawbar, preferably of standard construction, the rearward end of which is connected to the yoke comprising arms 6 which are connected at their forward to Figs. 1 and 2 of the draw-- .8 and 9, it being understood that both sections of the key are long enough to ass completely through the rearward end 0 the drawbar 5 and engage the slots 9 in the webs 7. The sections 11 and 12 are preferably provided with registering semi-circular depressions adjacent one end to receive a split pin 14 though other means for connecting the sections 11 and 12 may be employed. Obviously from the construction the section 12 of the key is constrained to move with the section 11 and since the pin 1 1 is spaced from the adjacent web 7 a distance greater than the possible movement of the key the .pin can not be sheared.

Referring to Figs. 3 and 4 of the drawing the drawbar 5 is' illustrated as connected to the webs 7 of the yoke by a key comprising sections 16 and 17, the section 16 being upset or otherwise providedwith a projecting portion 18 engaging between shoulders 19 on the interior of the drawbar 5. The section 16 is thus constrained to move with the drawbar 5. The sections 16 and 17 are preferably provided with registering openings to receive a split pin 20 though other means for connecting the sections 16 and 17 may be employed. Thus the section 17 is constrained to move with the section 16. It will be understood that the sections 16 and 17 of the key are sufiiciently long to pass entirely through the drawbar 5 and en age the slots in the webs 7 as in the preceding embodiment of my invention and that the pin 20 is protected from shearing forces as previously described in connection with the pin 14 of Figs. 1 and 2.

The drawbar and yoke illustrated in the drawing are of standard construction and no modifications thereof are necessary in order to employ my improved key which replaces keys now commonly in use with the above enumerated advantages. The improved key is simple in construction, inexpensive and because it can not be dis laced and lost it will result in a considerable saving in addition to overcomlng the possibility of disastrous separation of cars in motion.

It will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spiritand scope of the invention or sacrificing any of its material advantages, the forms hereinbefore described being merely preferred embodiments thereof.

I claim:

1. In a railway draft rigging, the combination of a drawbar, a yoke, and a key connecting said drawbar and yoke, said key being freely movable with respect to said yoke and constrained to follow the lateral movements of said drawbar.

2. In a railway draft rigging, the combination of a drawbar, a yoke, and a key connecting said drawbar-and yoke and having means to engage a portion of said drawbar whereby said key is constrained to follow the. lateral movements ofsaid drawbar, said key being freely movable with respect to said yoke.

3 In a railway draft rigging, the combinatlon of a drawbar, a yoke, and a key connecting said drawbar and'yoke and comprising two sections, one of said sections being constrained to follow the lateral movements of said drawbar and the other section being constrained to move with said firstmentioned section. r 4. A drawbar yoke key comprising two sections, one of said sections having a medially. disposed projecting portion, and means for connecting said sections.

5. A drawbar yoke key comprising two sections, one of said sections having a medially disposed projecting portion, registering depressions in adjacent portions of said sections and a pin to engage said depressions whereby said sections are constrained to move as a unit. v

CHARLES A. CARSOADIN.

Witnesses:

ERNEST H. MERCHANT, W. T. WESTERBERG.

denies oi this assent may be obtained for five cents each, by addressing the "commissioner of Patents, Washington, 3. Q. 

